Box blank



FIG. 1 is a plan view of a box blank, showing our new design, the opposite side thereof being a mirror image thereto;

FIG. 2 is an end view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a side view, oposide the side view of FIG. 3; and,

FIG. 5 is an end view, opposide the end view of FIG. 2. 

The ornamental design for a box blank, as shown and described. 